Cosmic Inflation is a theory in cosmology that suggests the universe underwent a rapid expansion just after the Big Bang. This expansion happened in a fraction of a second, causing the universe to grow exponentially. It helps explain the uniformity of the cosmic microwave background radiation and the large-scale structure of the universe. The idea of inflation addresses several puzzles in cosmology, such as why distant regions of space appear so similar despite being far apart. By proposing that the universe expanded faster than the speed of light, Cosmic Inflation provides a framework for understanding the early moments of the universe's existence.